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open Ident
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open Location
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exception NonExhaustive of Types.descr
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exception Constraint of Types.descr * Types.descr
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exception ShouldHave of Types.descr * string
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exception WrongLabel of Types.descr * label
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exception UnboundId of id * bool
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exception ShouldHave2 of Types.descr * string * Types.descr
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exception Error of string
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val warning: loc -> string -> unit
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val error: loc -> string -> 'a
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include Custom.T
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val empty_env: t
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val get_ns_table : t -> Ns.table
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val enter_ns : U.t -> Ns.t -> t -> t
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val enter_value: id -> Types.t -> t -> t
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val enter_values: (id * Types.t) list -> t -> t
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val find_value: id -> t -> Types.t
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val enter_type: id -> Types.t -> t -> t
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val enter_types: (id * Types.t) list -> t -> t
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val find_type: id -> t -> Types.t
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val type_defs: t -> (id * Ast.ppat) list -> (id * Types.t) list
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val typ: t -> Ast.ppat -> Types.Node.t
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val pat: t -> Ast.ppat -> Patterns.node
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val dump_types: Format.formatter -> t -> unit
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val dump_ns: Format.formatter -> t -> unit
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val set_ns_table_for_printer: t -> unit
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val expr: t -> Ast.pexpr -> fv * Typed.texpr
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val let_decl : t -> Ast.ppat -> Ast.pexpr -> Typed.let_decl
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val type_check:
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t -> Typed.texpr -> Types.descr -> bool -> Types.descr
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(* [type_check env e t precise] checks that expression [e]
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has type [t] under typing environment [env]; if [precise=true],
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also returns a possible more precise type for [e].
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*)
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val type_let_decl: t -> Typed.let_decl -> (id * Types.t) list
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val type_rec_funs: t -> Typed.texpr list -> (id * Types.t) list
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(* Assume that all the expressions are Abstractions *)
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val report_unused_branches : unit -> unit
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(* Issue warnings for unused branches *)
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val clear_unused_branches : unit -> unit
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val flatten: loc ->
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(Types.t -> bool -> Types.t) -> (Types.t -> bool -> Types.t)
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(** {2 Schema stuff} *)
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(** register a schema *)
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val register_schema: string -> Schema_types.schema -> unit
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(** @return the validator for a Schema global element *)
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val get_schema_validator: string * string -> Schema_validator.validator
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(** DEBUG ONLY *)
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(* return the type of a global schema element *)
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val get_schema_type: string * string -> Types.descr
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(* Operators *)
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type type_fun = Types.t -> bool -> Types.t
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val mk_unary_op: (string -> t -> int) ref
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val typ_unary_op: (int -> loc -> type_fun -> type_fun) ref
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val mk_binary_op: (string -> t -> int) ref
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val typ_binary_op: (int -> loc -> type_fun -> type_fun -> type_fun) ref
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